Ever pick up a ring of keys and wonder where they all go and what they open? Or worse yet, spend five minutes trying to open a lock in the dark, late at night, during a downpour? Color-coding your keys makes opening locks a breeze. Just put a dab of the same color paint or the same color adhesive dots on keys and locks that go together. Then, at a glance, you'll be able to find the one you're looking for, no matter how many keys you have on your ring. You can forget memorizing shapes and special names on various keys. Now all you'll have to do is connect the dots. And that's the On The House tip for today.